/* Dark mode styles */
:root {
    --dark-bg: #1a1a1a;
    --dark-card-bg: #2d2d2d;
    --dark-text: #ffffff;
    --dark-text-secondary: #b0b0b0;
    --dark-border: #404040;
    --dark-hover: #3d3d3d;
    --accent-color: #667eea;
    --accent-hover: #5a6fd8;
    --header-bg: #1a1a1a;
}

body {
    background-color: #f5f5f5;
}

body.dark-mode {
    background-color: var(--dark-bg);
    color: var(--dark-text);
}

/* Header and Navigation */
.header {
    background: var(--header-bg);
    color: white;
    padding: 0;
    box-shadow: 0 2px 10px rgba(0,0,0,0.2);
}

.nav-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0.75rem 2rem;
}

.nav-links {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-links a {
    color: var(--dark-text-secondary);
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 5px;
    transition: all 0.3s ease;
}

.nav-links a:hover, 
.nav-links a.active {
    color: white;
    background: var(--accent-color);
}

.nav-links span {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 1rem;
    color: var(--dark-text-secondary);
}

.nav-links .logout-btn {
    color: var(--dark-text-secondary);
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 5px;
    transition: all 0.3s ease;
}

.nav-links .logout-btn:hover {
    color: white;
    background: var(--accent-color);
}

/* Cards and sections */
.dark-mode .sensor-card {
    background: var(--dark-card-bg);
    color: var(--dark-text);
    border-color: var(--dark-border);
}

.dark-mode .sensor-card.hidden {
    opacity: 0.6;
}

.dark-mode .sensor-card h3 {
    color: var(--dark-text);
}

.dark-mode .sensor-meta {
    color: var(--dark-text-secondary);
}

.dark-mode .visibility-status {
    background: rgba(102, 126, 234, 0.2);
}

.dark-mode .visibility-status.hidden {
    background: rgba(255, 255, 255, 0.1);
    color: var(--dark-text-secondary);
}

.dark-mode .toggle-btn.hide {
    background-color: #404040;
    color: var(--dark-text);
}

.dark-mode .toggle-btn.show {
    background-color: var(--accent-color);
    color: white;
}

.dark-mode .toggle-btn:hover {
    opacity: 0.9;
}

/* Messages */
.dark-mode .message.success {
    background-color: rgba(25, 135, 84, 0.2);
    color: #98f5b1;
    border-color: #198754;
}

.dark-mode .message.error {
    background-color: rgba(220, 53, 69, 0.2);
    color: #f8d7da;
    border-color: #dc3545;
}

/* Sensor specific styles */
.dark-mode .sensor-card.visible {
    border-left-color: var(--accent-color);
}

.dark-mode .sensor-card.hidden {
    border-left-color: var(--dark-border);
}

.dark-mode .visibility-status.visible {
    color: #a5b4fc;
}

.dark-mode .sensor-info h3 {
    color: var(--dark-text);
}

.dark-mode .sensor-meta span {
    color: var(--dark-text-secondary);
}

/* Stats and summary sections */
.dark-mode .stat-card {
    background: var(--dark-card-bg);
}

.dark-mode .stat-label {
    color: var(--dark-text-secondary);
}

/* Make sure text inputs and selects are readable */
.dark-mode input,
.dark-mode select,
.dark-mode textarea {
    background: var(--dark-card-bg);
    color: var(--dark-text);
    border-color: var(--dark-border);
}

/* Hover states */
.dark-mode .sensor-card:hover {
    background: var(--dark-hover);
}

/* Table styles */
.dark-mode .sensors-section {
    background: var(--dark-card-bg);
}

.dark-mode .section-header {
    background: var(--dark-bg);
    border-color: var(--dark-border);
}

.dark-mode .section-header h2 {
    color: var(--dark-text);
}

.dark-mode .section-header p {
    color: var(--dark-text-secondary);
}

.dark-mode .sensors-table th {
    background: var(--dark-bg);
    color: var(--dark-text);
    border-color: var(--dark-border);
}

.dark-mode .sensors-table td {
    border-color: var(--dark-border);
}

.dark-mode .sensors-table tr:hover {
    background: var(--dark-hover);
}

.dark-mode small {
    color: var(--dark-text-secondary) !important;
}

.dark-mode .refresh-info {
    color: var(--dark-text-secondary);
}

.dark-mode .refresh-info a {
    color: var(--accent-color);
}